Comparing the two fragrances…

Dior

LINK
Miss
IV
Shared character
Both Miss and IV contain notes of rose, bergamot, vanilla, musk, pink pepper, patchouli, lily of the valley, and caramel.
How they differ
Miss features a complex profile with unique notes including jasmine, gardenia, sandalwood, iris/orris, neroli, oakmoss, benzoin, mandarin, peony, galbanum, tonka bean, ambergris, apricot, blood orange, strawberry, cedarwood, and various rose varieties such as rose (Bulgaria), rose (Turkey), rose centifolia, and rose (Grasse). It is characterized by floral, chypre, green, spicy, and animal accords. In contrast, IV is defined by citrus, sweet, caramel, musky, patchouli, rose, vanilla, and white floral accords.
Who each suits
Miss suits individuals interested in a multifaceted composition involving chypre, green, and spicy elements. IV suits individuals who prefer scents characterized by sweet, citrus, and white floral accords.
Only in IV